What ranks can be used to address an NCO?

In the context of addressing a Non-Commissioned Officer (NCO), the ranks that can be used are primarily those that reflect the structure and chain of command within the Army. The correct answer includes Corporal, Sergeant, First Sergeant, and Sergeant Major, all of which are recognized NCO ranks.

Addressing an NCO by their appropriate rank is crucial for maintaining military courtesy and discipline. Corporals and Sergeants are both entry and mid-level ranks that serve as the backbone of the NCO corps, directly supervising Soldiers. First Sergeants and Sergeant Majors represent higher levels of responsibility and leadership within the NCO ranks, overseeing operations and personnel management at more senior levels.

In this context, the other options include ranks that either do not pertain to the NCO tier or include officers who would not typically be addressed in the same manner as an NCO. For example, officers like Lieutenant and Major do not fall under the NCO category and would not be addressed as NCOs. This reinforces the importance of understanding the distinctions between rank categories within the military hierarchy for proper address protocols.